Hydroaeroplane



May 1, 1923. 1,453,496

- c. DORNIER HYDROAEROPLANE Filed. June 28, 1920 INVENTOR:

Patented ay ll, lQZZi.

CLAUDIUS nonmnn, or FRIEDRICHSHAFEN, GER-MANY, AssIGNon TO THE FIRM LUFTSCHIF'FBAU zEPrELmensnLLscHArr MIT nnscnnanxrnn UNG,

or rnlnnmonsnnrnn', GERMANY.

HYnnoaEnorLANE.

Application filed June 2 8, 1920. SerialNo, 392,555.

To allwhom itmay concern; I

-Be' it known that I, CmonmsDonmnn,

a citizen of the German Empire, residing at Friedrichshafen, Germany, have invented 5 certain new and useful Improvements in Hydroaeroplanes (for which I have filed application in Germany February 5, 1915), of which the following is a'specification.

The dropping 0t explosives in the case of hydroaeroplanes is achieved in the most simple manner through an opening in the floor of the boat or the floats, over which the -ex-' gosives are suspended ready for dropping. 3'

this means the suspension of bombs out 1 side the boat connected with manifold 11nconveniences is avoided. A disadvantage of this arrangement consists in the risk of can, for the rest, have a cross-section ac-' cording'to choice. All risk of precipitation being prevented by the walls of the shaft forming a kindof parapet, several largesized bombs as well asobservator'y instru-.

ments such as-sighting telescopes, photo-- graphic apparatus, etc., can be suspended without delay at the-suitable moment. On

account of the occasional floating on the l 40 water, the height ,of the. shaft, it is true,

must not be less than'a certain minimum as the fluid in the courseot'fioating shoots upwards through, the aperture provided in the gliding-floor ofthe boat, 1f the large 1 opening is not kept closed-by a complicated I device, whilst moving on-the water.

By the installation of he. shaft carried andFig. 2 is a planet 9. boat-having a rectangnlaro or passageway, while 1 to an adequate height the serviceableness and permanent readiness for use of the flyf ing-boat is v materially increased, as the [W bombs and equipments are continually safes guarded from the influences of the wind and the water duringthe flight in the air and the motion on the water, yet remaining in constant readiness for use .without there being any need to temporarily closeup the lower opening of the shaft. The drawback, which is still attached to a high wall ofthe shaft on account of the additional weight and the decrease in space, can also be remedied. 0 so This inconvenience is removed in accordance with the-present invention" by arrang ing the shaft in sucha place on the boat that its lower aperture appears rightv behind a stepin the floor of t have proved that in this case even with low and medium speeds of running no water rises through the opening. With higher speeds the boat rises to thestep andnow' the floor is even dry on the level of the dropto 'ping aperture, he it is no longer washed bythe water. In such ran arrangement of the box-shaped shaft, even if it almost occupies the full beam of the boat, there is moreover the possibility of making the walls of the shaft riddled or railed and thusattain a furtherconsiderable reduction in weight.

The position of the dropping aperture right, behind the stepofiers still another advantage. For the air through it,- hasaccess 8D in the most ample manner on account of' the breadth of the shaft-opening to the step and to the 'artof the floor situated behind the step. s is well known, starting is ma terially facilitated by this, means, for the backwardportion of .the floor of the boat which remains more or less dry, then only calls forth 'a verysmall running resistance. a

In the drawing attached to this specification and formingpart thereof, two modifications embodyingmy invention are illustrated. p

Fig. 1.;is1a vertical longitudinalsection,

andf i, respectively, are similar Y e boat. Experiments as I views of a boat having an-opening or passageway of triangular section. f

Throughout the figures 1 is the hull, 2 is the bottom step, 3 is the bottom opening, 4; 5 and 5, respectively, are the internal compartments, and 6 and 7, respectively, the walls surrounding them.

I claim: A flying boat comprising a hydroplaning IU hull provided with a bottom step, a bottom meanee opening, and an internal compartment, the walls of which surround the opening and extend vertically upward, the opening forming a passageway from the compartment through the bottom and'through which articles may be dropped, the forward boundary of the opening being located at the step.

'In testimony whereof I afiix my signa= ture. v

CLAUDIUS DORNIER. 

